Abstract
Recently, introduction of renewable energy sources like wind power generation and photovoltaic power generation has been increasing from the viewpoint of environmental problems. However, renewable energy power supplies have unstable output due to the influence of weather conditions such as wind speed variations, which may cause fluctuations of voltage and frequency in the power system. This paper proposes fuzzy PD based virtual inertia control system to decrease frequency fluctuations in power system caused by fluctuating output of renewable energy sources. The proposed new method is based on the coordinated control of HVDC interconnection line and battery, and energy balancing control is also incorporated in it. Finally, it is concluded that the proposed system is very effective for suppressing the frequency fluctuations of the power system due to the large-scale wind power generation and solar power generation and also for keeping the energy balancing in the HVDC transmission line.
Highlights
IntroductionThe output of these renewable energy power generations may fluctuate due to intermittent characteristics like fluctuations of wind speed and solar radiation intensity
This paper proposes fuzzy PD based virtual inertia control system to decrease frequency fluctuations in power system caused by fluctuating output of renewable energy sources
It is concluded that the proposed system is very effective for suppressing the frequency fluctuations of the power system due to the large-scale wind power generation and solar power generation and for keeping the energy balancing in the High Voltage Direct Current (HVDC) transmission line
Summary
The output of these renewable energy power generations may fluctuate due to intermittent characteristics like fluctuations of wind speed and solar radiation intensity This can cause power system frequency and voltage fluctuations. This paper proposes fuzzy PD based virtual inertia control system to restrain system frequency fluctuation caused by fluctuating output of renewable energy power supply, which is based on the coordinated control of HVDC interconnection line and battery. Though there have been some reports so far in which power system frequency fluctuations caused by fluctuating output of renewable power sources are controlled by using HVDC interconnection line and battery as stated above, there is almost no one which achieves the energy balancing control as far as the authors know.
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